Akihiko Doi

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
High frequency modulator
- Patent number 8,437,232
- Issue date May 7, 2013
- Texas Instruments Incorporated
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Current gain control system
- Patent number 8,134,897
- Issue date Mar 13, 2012
- Texas Instruments Incorporated
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus including a divided photodetector
- Patent number 8,068,393
- Issue date Nov 29, 2011
- Toshiba Samsung Storage Technology Corporation
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Over current protection device
- Patent number 8,009,546
- Issue date Aug 30, 2011
- Texas Instruments Incorporated
- Shengyuan Li
- G11 - INFORMATION STORAGE
Information Patent Grant
HFM enable control system
- Patent number 8,000,200
- Issue date Aug 16, 2011
- Texas Instruments Incorporated
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk device and control method
- Patent number 7,911,911
- Issue date Mar 22, 2011
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus
- Patent number 7,706,217
- Issue date Apr 27, 2010
- Toshiba Samsung Storage Technology Corporation
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc drive and signal processing method
- Patent number 6,714,500
- Issue date Mar 30, 2004
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording and reproducing optical disk device with multi-disk type...
- Patent number 5,901,125
- Issue date May 4, 1999
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus having improved read accuracy with non-linea...
- Patent number 5,406,536
- Issue date Apr 11, 1995
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal processing circuit for optical disk apparatus
- Patent number 5,309,425
- Issue date May 3, 1994
- Kabushiki Kaisha Toshiba
- Mikio Yamamuro
- G11 - INFORMATION STORAGE
Information Patent Grant
Objective lens position detecting system capable of adjusting amoun...
- Patent number 5,306,903
- Issue date Apr 26, 1994
- Kabushiki Kaisha Toshiba
- Mikio Yamamuro
- G02 - OPTICS
Information Patent Grant
System for recording information on an optical recording medium
- Patent number 5,161,144
- Issue date Nov 3, 1992
- Kabushiki Kaisha Toshiba
- Ryoji Takeuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording system capable of preventing overwriting
- Patent number 5,101,396
- Issue date Mar 31, 1992
- Kabushiki Kaisha Toshiba
- Ryoji Takeuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Information processing apparatus
- Patent number 5,063,548
- Issue date Nov 5, 1991
- Kabushiki Kaisha Toshiba
- Hiroshi Yamashita
- G11 - INFORMATION STORAGE
Information Patent Grant
System for detecting the position of an objective lens
- Patent number 4,900,910
- Issue date Feb 13, 1990
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical focusing in magneto-optic disk system
- Patent number 4,764,912
- Issue date Aug 16, 1988
- Kabushiki Kaisha Toshiba
- Hideo Ando
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk and recording/reproducing device for optical disk
- Patent number 4,755,980
- Issue date Jul 5, 1988
- Kabushiki Kaisha Toshiba
- Tomohisa Yoshimaru
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical system and method for reducing vibration of an objective le...
- Patent number 4,684,797
- Issue date Aug 4, 1987
- Kabushiki Kaisha Toshiba
- Hideo Ando
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head
- Patent number 4,641,023
- Issue date Feb 3, 1987
- Kabushiki Kaisha Toshiba
- Hideo Ando
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
CURRENT GAIN CONTROL SYSTEM
- Publication number 20100315919
- Publication date Dec 16, 2010
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
HFM ENABLE CONTROL SYSTEM
- Publication number 20100315926
- Publication date Dec 16, 2010
- Akihiko Doi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Over Current Protection Device
- Publication number 20100315924
- Publication date Dec 16, 2010
- Shengyuan Li
- G11 - INFORMATION STORAGE
Information Patent Application
HIGH FREQUENCY MODULATOR
- Publication number 20100315937
- Publication date Dec 16, 2010
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISC APPARATUS
- Publication number 20090296546
- Publication date Dec 3, 2009
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISK DEVICE AND CONTROL METHOD
- Publication number 20090245045
- Publication date Oct 1, 2009
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISK DEVICE AND CONTROL METHOD
- Publication number 20090245056
- Publication date Oct 1, 2009
- Kabushiki Kaisha Toshiba
- Akihiko DOI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISC APPARATUS, CONTROLLER OF OPTICAL DISC APPARATUS, AND C...
- Publication number 20090003152
- Publication date Jan 1, 2009
- Kabushiki Kaisha Toshiba
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISC APPARATUS
- Publication number 20070076545
- Publication date Apr 5, 2007
- Akihiko Doi
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disc drive and signal processing method
- Publication number 20030107966
- Publication date Jun 12, 2003
- Akihiko Doi
- G11 - INFORMATION STORAGE

Akihiko Doi

Person

Patents Grantslast 30 patents

High frequency modulator

Current gain control system

Optical disc apparatus including a divided photodetector

Over current protection device

HFM enable control system

Optical disk device and control method

Optical disc apparatus

Optical disc drive and signal processing method

Recording and reproducing optical disk device with multi-disk type...

Optical disc apparatus having improved read accuracy with non-linea...

Signal processing circuit for optical disk apparatus

Objective lens position detecting system capable of adjusting amoun...

System for recording information on an optical recording medium

Information recording system capable of preventing overwriting

Information processing apparatus

System for detecting the position of an objective lens

Optical focusing in magneto-optic disk system

Optical disk and recording/reproducing device for optical disk

Optical system and method for reducing vibration of an objective le...

Optical head

Patents Applicationslast 30 patents

CURRENT GAIN CONTROL SYSTEM

HFM ENABLE CONTROL SYSTEM

Over Current Protection Device

HIGH FREQUENCY MODULATOR

OPTICAL DISC APPARATUS

OPTICAL DISK DEVICE AND CONTROL METHOD

OPTICAL DISK DEVICE AND CONTROL METHOD

OPTICAL DISC APPARATUS, CONTROLLER OF OPTICAL DISC APPARATUS, AND C...

OPTICAL DISC APPARATUS

Optical disc drive and signal processing method